Needle Seal (For pH 1-14, for operation up to 130 Back Catalog number: CTS-21089 Availability: In the manufacturer's stock Price on request - + Recommended CTS-5531-07 Solvent Bottle Filter, 7/pk Price on request CTS-A159 Inlet Check Valve Price on request CTS-5464 Clip Ring, Plunger Retainer Price on request